Elymus elytrigioides (C. Yen & J. L. Yang) S. L. Chen

Plants with rhizome. Culms laxly tufted, erect, 60–75 cm tall, 1–1.2 mm in diam., 2–4(–6)-noded, glabrous. Leaf sheath shorter than internode, glabrous, fibrous and broken at base; ligule ca. 0.5 mm, membranous, apex truncate; leaf blade green, flat or involute, (7–)10–15 × 0.15–0.33 cm, stiff. Spike linear, straight, (5–)8–16 cm, with 5–12 spikelets; rachis glabrous; internodes 8–15 mm, or to 20 mm at base of spike. Spikelets 1 per node, 12–15 mm, with 5 or 6 florets; rachilla glabrous or puberulent; internodes 1.5–1.8 mm. Glumes oblong-lanceolate, herbaceous, glabrous, margin membranous, apex obtuse or acute, unilaterally dentate; proximal glume 3.5–6.5 mm, 3- or 4-veined; distal glume 5–8.5 mm, 4- or 5-veined. Lemma oblong-lanceolate, 5-veined, glabrous, apex obtuse or withpoint ca. 0.5 mm; first lemma 7.8–9 mm; callus obtuse, puberulent. Palea equaling or slightly longer than lemma, abaxially glabrous, ciliolate along keels distally, apex truncate. Anthers yellow or pale brown, 4.5–5 mm. Caryopsis dark purple, oblong, ca. 5.5 × 1.5 mm, apex densely white hispidulous. Fl. and fr. Jul–Aug. 2n = 28*.

Xizang (Qamdo).

* Mountain rocks among Caragana, river banks; ca. 3200 m.

Basionym: Roegneria elytrigioides C. Yen & J. L. Yang, Acta Bot. Yunnan. 6: 75. 1984; Pseudoroegneria elytrigioides (C. Yen & J. L. Yang ) B. Rong Lu; R. alashanica Keng var. elytrigioides (C. Yen & J. L. Yang) L. B. Cai.